diff --git a/bin/generate-tests.php b/bin/generate-tests.php
index bf4831dc..7bc291ef 100755
--- a/bin/generate-tests.php
+++ b/bin/generate-tests.php
@@ -145,7 +145,7 @@
 add_test(['enabled:hello', '--context', 'production'], 'EnabledInProduction');
 add_test(['list', '--raw', '--format', 'txt', '--short'], 'ListTest', skipOnBinary: true);
 add_test(['parallel:sleep', '--sleep5', '0', '--sleep7', '0', '--sleep10', '0'], 'ParallelSleepTest');
-add_test(['symfony:greet', 'World', '--french', 'COUCOU', '--punctuation', '!' ], 'SymfonyGreetTest', skipOnBinary: true);
+add_test(['symfony:greet', 'World', '--french', 'COUCOU', '--punctuation', '!'], 'SymfonyGreetTest', skipOnBinary: true);
 add_test(['symfony:hello'], 'SymfonyHelloTest', skipOnBinary: true);
 // In /tmp
 add_test(['completion', 'bash'], 'NoConfigCompletionTest', '/tmp');
@@ -174,6 +174,8 @@ function add_test(array $args, string $class, ?string $cwd = null, bool $needRem
     );
     $process->run();
 
+    $err = OutputCleaner::cleanOutput($process->getErrorOutput());
+
     $code = strtr($template, [
         '{{ class_name }}' => $class,
         '{{ task }}' => $args[0] ?? 'no task',
@@ -184,18 +186,25 @@ function add_test(array $args, string $class, ?string $cwd = null, bool $needRem
         '{{ skip-on-binary }}' => match ($skipOnBinary) {
             true => <<<'PHP'
 
-                    if (self::$binary) {
-                        $this->markTestSkipped('This test is not compatible with the binary version of Castor.');
-                    }
+                        if (self::$binary) {
+                            $this->markTestSkipped('This test is not compatible with the binary version of Castor.');
+                        }
 
-            PHP,
+                PHP,
             default => '',
         },
+        '{{ error-assertion }}' => match ((bool) $err) {
+            true => <<<'PHP'
+                $this->assertStringEqualsFile(__FILE__ . '.err.txt', $process->getErrorOutput());
+                PHP,
+            default => <<<'PHP'
+                $this->assertSame('', $process->getErrorOutput());
+                PHP,
+        },
     ]);
 
     file_put_contents(__DIR__ . '/../tests/Examples/Generated/' . $class . '.php', $code);
     file_put_contents(__DIR__ . '/../tests/Examples/Generated/' . $class . '.php.output.txt', OutputCleaner::cleanOutput($process->getOutput()));
-    $err = OutputCleaner::cleanOutput($process->getErrorOutput());
     if ($err) {
         file_put_contents(__DIR__ . '/../tests/Examples/Generated/' . $class . '.php.err.txt', $err);
     }
@@ -217,10 +226,6 @@ public function test(): void
 
         $this->assertSame({{ exitCode }}, $process->getExitCode());
         $this->assertStringEqualsFile(__FILE__ . '.output.txt', $process->getOutput());
-        if (file_exists(__FILE__ . '.err.txt')) {
-            $this->assertStringEqualsFile(__FILE__ . '.err.txt', $process->getErrorOutput());
-        } else {
-            $this->assertSame('', $process->getErrorOutput());
-        }
+        {{ error-assertion }}
     }
 }
diff --git a/examples/symfony.php b/examples/symfony.php
index 9cac474b..385675c9 100755
--- a/examples/symfony.php
+++ b/examples/symfony.php
@@ -15,7 +15,7 @@
 use Symfony\Component\Console\Output\OutputInterface;
 
 #[AsCommand('hello', 'Says hello from a symfony application')]
-#[AsSymfonyTask(name: 'symfony:hello', console: [PHP_BINARY, __FILE__])] // We need to force PHP binary to support windows
+#[AsSymfonyTask(name: 'symfony:hello', console: [\PHP_BINARY, __FILE__])] // We need to force PHP binary to support windows
 class HelloCommand extends Command
 {
     protected function execute(InputInterface $input, OutputInterface $output): int
@@ -27,7 +27,7 @@ protected function execute(InputInterface $input, OutputInterface $output): int
 }
 
 #[AsCommand('greet')]
-#[AsSymfonyTask(name: 'symfony:greet', console: [PHP_BINARY, __FILE__])] // We need to force PHP binary to support windows
+#[AsSymfonyTask(name: 'symfony:greet', console: [\PHP_BINARY, __FILE__])] // We need to force PHP binary to support windows
 class GreetCommand extends Command
 {
     protected function configure(): void
diff --git a/tests/Examples/Generated/ArgPassthruExpanded.php b/tests/Examples/Generated/ArgPassthruExpanded.php
index 05f989f2..6c82d9cf 100644
--- a/tests/Examples/Generated/ArgPassthruExpanded.php
+++ b/tests/Examples/Generated/ArgPassthruExpanded.php
@@ -13,10 +13,6 @@ public function test(): void
 
         $this->assertSame(0, $process->getExitCode());
         $this->assertStringEqualsFile(__FILE__ . '.output.txt', $process->getOutput());
-        if (file_exists(__FILE__ . '.err.txt')) {
-            $this->assertStringEqualsFile(__FILE__ . '.err.txt', $process->getErrorOutput());
-        } else {
-            $this->assertSame('', $process->getErrorOutput());
-        }
+        $this->assertSame('', $process->getErrorOutput());
     }
 }
diff --git a/tests/Examples/Generated/ArgsAnotherArgsTest.php b/tests/Examples/Generated/ArgsAnotherArgsTest.php
index bae04fdb..243f67a2 100644
--- a/tests/Examples/Generated/ArgsAnotherArgsTest.php
+++ b/tests/Examples/Generated/ArgsAnotherArgsTest.php
@@ -13,10 +13,6 @@ public function test(): void
 
         $this->assertSame(0, $process->getExitCode());
         $this->assertStringEqualsFile(__FILE__ . '.output.txt', $process->getOutput());
-        if (file_exists(__FILE__ . '.err.txt')) {
-            $this->assertStringEqualsFile(__FILE__ . '.err.txt', $process->getErrorOutput());
-        } else {
-            $this->assertSame('', $process->getErrorOutput());
-        }
+        $this->assertSame('', $process->getErrorOutput());
     }
 }
diff --git a/tests/Examples/Generated/ArgsArgsTest.php b/tests/Examples/Generated/ArgsArgsTest.php
index 9c14a65a..48438bb9 100644
--- a/tests/Examples/Generated/ArgsArgsTest.php
+++ b/tests/Examples/Generated/ArgsArgsTest.php
@@ -13,10 +13,6 @@ public function test(): void
 
         $this->assertSame(0, $process->getExitCode());
         $this->assertStringEqualsFile(__FILE__ . '.output.txt', $process->getOutput());
-        if (file_exists(__FILE__ . '.err.txt')) {
-            $this->assertStringEqualsFile(__FILE__ . '.err.txt', $process->getErrorOutput());
-        } else {
-            $this->assertSame('', $process->getErrorOutput());
-        }
+        $this->assertSame('', $process->getErrorOutput());
     }
 }
diff --git a/tests/Examples/Generated/ArgsAutocompleteArgumentTest.php b/tests/Examples/Generated/ArgsAutocompleteArgumentTest.php
index b2b600ee..99c78edd 100644
--- a/tests/Examples/Generated/ArgsAutocompleteArgumentTest.php
+++ b/tests/Examples/Generated/ArgsAutocompleteArgumentTest.php
@@ -13,10 +13,6 @@ public function test(): void
 
         $this->assertSame(0, $process->getExitCode());
         $this->assertStringEqualsFile(__FILE__ . '.output.txt', $process->getOutput());
-        if (file_exists(__FILE__ . '.err.txt')) {
-            $this->assertStringEqualsFile(__FILE__ . '.err.txt', $process->getErrorOutput());
-        } else {
-            $this->assertSame('', $process->getErrorOutput());
-        }
+        $this->assertSame('', $process->getErrorOutput());
     }
 }
diff --git a/tests/Examples/Generated/ArgsPassthruTest.php b/tests/Examples/Generated/ArgsPassthruTest.php
index 3f6b2d02..61dab182 100644
--- a/tests/Examples/Generated/ArgsPassthruTest.php
+++ b/tests/Examples/Generated/ArgsPassthruTest.php
@@ -13,10 +13,6 @@ public function test(): void
 
         $this->assertSame(0, $process->getExitCode());
         $this->assertStringEqualsFile(__FILE__ . '.output.txt', $process->getOutput());
-        if (file_exists(__FILE__ . '.err.txt')) {
-            $this->assertStringEqualsFile(__FILE__ . '.err.txt', $process->getErrorOutput());
-        } else {
-            $this->assertSame('', $process->getErrorOutput());
-        }
+        $this->assertSame('', $process->getErrorOutput());
     }
 }
diff --git a/tests/Examples/Generated/AutocompleteInvalidTest.php b/tests/Examples/Generated/AutocompleteInvalidTest.php
index 2531c1e2..8aecf7ce 100644
--- a/tests/Examples/Generated/AutocompleteInvalidTest.php
+++ b/tests/Examples/Generated/AutocompleteInvalidTest.php
@@ -13,10 +13,6 @@ public function test(): void
 
         $this->assertSame(1, $process->getExitCode());
         $this->assertStringEqualsFile(__FILE__ . '.output.txt', $process->getOutput());
-        if (file_exists(__FILE__ . '.err.txt')) {
-            $this->assertStringEqualsFile(__FILE__ . '.err.txt', $process->getErrorOutput());
-        } else {
-            $this->assertSame('', $process->getErrorOutput());
-        }
+        $this->assertStringEqualsFile(__FILE__ . '.err.txt', $process->getErrorOutput());
     }
 }
diff --git a/tests/Examples/Generated/BarBarTest.php b/tests/Examples/Generated/BarBarTest.php
index 193873c2..4710d81e 100644
--- a/tests/Examples/Generated/BarBarTest.php
+++ b/tests/Examples/Generated/BarBarTest.php
@@ -13,10 +13,6 @@ public function test(): void
 
         $this->assertSame(0, $process->getExitCode());
         $this->assertStringEqualsFile(__FILE__ . '.output.txt', $process->getOutput());
-        if (file_exists(__FILE__ . '.err.txt')) {
-            $this->assertStringEqualsFile(__FILE__ . '.err.txt', $process->getErrorOutput());
-        } else {
-            $this->assertSame('', $process->getErrorOutput());
-        }
+        $this->assertSame('', $process->getErrorOutput());
     }
 }
diff --git a/tests/Examples/Generated/CacheComplexTest.php b/tests/Examples/Generated/CacheComplexTest.php
index 9e053624..af4c84e3 100644
--- a/tests/Examples/Generated/CacheComplexTest.php
+++ b/tests/Examples/Generated/CacheComplexTest.php
@@ -13,10 +13,6 @@ public function test(): void
 
         $this->assertSame(0, $process->getExitCode());
         $this->assertStringEqualsFile(__FILE__ . '.output.txt', $process->getOutput());
-        if (file_exists(__FILE__ . '.err.txt')) {
-            $this->assertStringEqualsFile(__FILE__ . '.err.txt', $process->getErrorOutput());
-        } else {
-            $this->assertSame('', $process->getErrorOutput());
-        }
+        $this->assertSame('', $process->getErrorOutput());
     }
 }
diff --git a/tests/Examples/Generated/CacheSimpleTest.php b/tests/Examples/Generated/CacheSimpleTest.php
index e25b9d37..c8860a89 100644
--- a/tests/Examples/Generated/CacheSimpleTest.php
+++ b/tests/Examples/Generated/CacheSimpleTest.php
@@ -13,10 +13,6 @@ public function test(): void
 
         $this->assertSame(0, $process->getExitCode());
         $this->assertStringEqualsFile(__FILE__ . '.output.txt', $process->getOutput());
-        if (file_exists(__FILE__ . '.err.txt')) {
-            $this->assertStringEqualsFile(__FILE__ . '.err.txt', $process->getErrorOutput());
-        } else {
-            $this->assertSame('', $process->getErrorOutput());
-        }
+        $this->assertSame('', $process->getErrorOutput());
     }
 }
diff --git a/tests/Examples/Generated/CdDirectoryTest.php b/tests/Examples/Generated/CdDirectoryTest.php
index adcd1930..167ec515 100644
--- a/tests/Examples/Generated/CdDirectoryTest.php
+++ b/tests/Examples/Generated/CdDirectoryTest.php
@@ -13,10 +13,6 @@ public function test(): void
 
         $this->assertSame(0, $process->getExitCode());
         $this->assertStringEqualsFile(__FILE__ . '.output.txt', $process->getOutput());
-        if (file_exists(__FILE__ . '.err.txt')) {
-            $this->assertStringEqualsFile(__FILE__ . '.err.txt', $process->getErrorOutput());
-        } else {
-            $this->assertSame('', $process->getErrorOutput());
-        }
+        $this->assertSame('', $process->getErrorOutput());
     }
 }
diff --git a/tests/Examples/Generated/ContextContextDoNotExistTest.php b/tests/Examples/Generated/ContextContextDoNotExistTest.php
index fc453d44..abb00fcb 100644
--- a/tests/Examples/Generated/ContextContextDoNotExistTest.php
+++ b/tests/Examples/Generated/ContextContextDoNotExistTest.php
@@ -13,10 +13,6 @@ public function test(): void
 
         $this->assertSame(1, $process->getExitCode());
         $this->assertStringEqualsFile(__FILE__ . '.output.txt', $process->getOutput());
-        if (file_exists(__FILE__ . '.err.txt')) {
-            $this->assertStringEqualsFile(__FILE__ . '.err.txt', $process->getErrorOutput());
-        } else {
-            $this->assertSame('', $process->getErrorOutput());
-        }
+        $this->assertStringEqualsFile(__FILE__ . '.err.txt', $process->getErrorOutput());
     }
 }
diff --git a/tests/Examples/Generated/ContextContextDynamicTest.php b/tests/Examples/Generated/ContextContextDynamicTest.php
index c144abcc..693dd76f 100644
--- a/tests/Examples/Generated/ContextContextDynamicTest.php
+++ b/tests/Examples/Generated/ContextContextDynamicTest.php
@@ -13,10 +13,6 @@ public function test(): void
 
         $this->assertSame(0, $process->getExitCode());
         $this->assertStringEqualsFile(__FILE__ . '.output.txt', $process->getOutput());
-        if (file_exists(__FILE__ . '.err.txt')) {
-            $this->assertStringEqualsFile(__FILE__ . '.err.txt', $process->getErrorOutput());
-        } else {
-            $this->assertSame('', $process->getErrorOutput());
-        }
+        $this->assertSame('', $process->getErrorOutput());
     }
 }
diff --git a/tests/Examples/Generated/ContextContextInfoForcedTest.php b/tests/Examples/Generated/ContextContextInfoForcedTest.php
index e3a963a9..9ae04421 100644
--- a/tests/Examples/Generated/ContextContextInfoForcedTest.php
+++ b/tests/Examples/Generated/ContextContextInfoForcedTest.php
@@ -13,10 +13,6 @@ public function test(): void
 
         $this->assertSame(0, $process->getExitCode());
         $this->assertStringEqualsFile(__FILE__ . '.output.txt', $process->getOutput());
-        if (file_exists(__FILE__ . '.err.txt')) {
-            $this->assertStringEqualsFile(__FILE__ . '.err.txt', $process->getErrorOutput());
-        } else {
-            $this->assertSame('', $process->getErrorOutput());
-        }
+        $this->assertSame('', $process->getErrorOutput());
     }
 }
diff --git a/tests/Examples/Generated/ContextContextMyDefaultTest.php b/tests/Examples/Generated/ContextContextMyDefaultTest.php
index 5a5be547..eb99cbd2 100644
--- a/tests/Examples/Generated/ContextContextMyDefaultTest.php
+++ b/tests/Examples/Generated/ContextContextMyDefaultTest.php
@@ -13,10 +13,6 @@ public function test(): void
 
         $this->assertSame(0, $process->getExitCode());
         $this->assertStringEqualsFile(__FILE__ . '.output.txt', $process->getOutput());
-        if (file_exists(__FILE__ . '.err.txt')) {
-            $this->assertStringEqualsFile(__FILE__ . '.err.txt', $process->getErrorOutput());
-        } else {
-            $this->assertSame('', $process->getErrorOutput());
-        }
+        $this->assertSame('', $process->getErrorOutput());
     }
 }
diff --git a/tests/Examples/Generated/ContextContextPathTest.php b/tests/Examples/Generated/ContextContextPathTest.php
index 21536ec6..ffeb72a9 100644
--- a/tests/Examples/Generated/ContextContextPathTest.php
+++ b/tests/Examples/Generated/ContextContextPathTest.php
@@ -13,10 +13,6 @@ public function test(): void
 
         $this->assertSame(0, $process->getExitCode());
         $this->assertStringEqualsFile(__FILE__ . '.output.txt', $process->getOutput());
-        if (file_exists(__FILE__ . '.err.txt')) {
-            $this->assertStringEqualsFile(__FILE__ . '.err.txt', $process->getErrorOutput());
-        } else {
-            $this->assertSame('', $process->getErrorOutput());
-        }
+        $this->assertSame('', $process->getErrorOutput());
     }
 }
diff --git a/tests/Examples/Generated/ContextContextProductionTest.php b/tests/Examples/Generated/ContextContextProductionTest.php
index e795e668..39ae1c33 100644
--- a/tests/Examples/Generated/ContextContextProductionTest.php
+++ b/tests/Examples/Generated/ContextContextProductionTest.php
@@ -13,10 +13,6 @@ public function test(): void
 
         $this->assertSame(0, $process->getExitCode());
         $this->assertStringEqualsFile(__FILE__ . '.output.txt', $process->getOutput());
-        if (file_exists(__FILE__ . '.err.txt')) {
-            $this->assertStringEqualsFile(__FILE__ . '.err.txt', $process->getErrorOutput());
-        } else {
-            $this->assertSame('', $process->getErrorOutput());
-        }
+        $this->assertSame('', $process->getErrorOutput());
     }
 }
diff --git a/tests/Examples/Generated/ContextContextRunTest.php b/tests/Examples/Generated/ContextContextRunTest.php
index 5cb7286b..5100ec00 100644
--- a/tests/Examples/Generated/ContextContextRunTest.php
+++ b/tests/Examples/Generated/ContextContextRunTest.php
@@ -13,10 +13,6 @@ public function test(): void
 
         $this->assertSame(0, $process->getExitCode());
         $this->assertStringEqualsFile(__FILE__ . '.output.txt', $process->getOutput());
-        if (file_exists(__FILE__ . '.err.txt')) {
-            $this->assertStringEqualsFile(__FILE__ . '.err.txt', $process->getErrorOutput());
-        } else {
-            $this->assertSame('', $process->getErrorOutput());
-        }
+        $this->assertSame('', $process->getErrorOutput());
     }
 }
diff --git a/tests/Examples/Generated/ContextContextTest.php b/tests/Examples/Generated/ContextContextTest.php
index 2cb5749a..7ec2e86b 100644
--- a/tests/Examples/Generated/ContextContextTest.php
+++ b/tests/Examples/Generated/ContextContextTest.php
@@ -13,10 +13,6 @@ public function test(): void
 
         $this->assertSame(0, $process->getExitCode());
         $this->assertStringEqualsFile(__FILE__ . '.output.txt', $process->getOutput());
-        if (file_exists(__FILE__ . '.err.txt')) {
-            $this->assertStringEqualsFile(__FILE__ . '.err.txt', $process->getErrorOutput());
-        } else {
-            $this->assertSame('', $process->getErrorOutput());
-        }
+        $this->assertSame('', $process->getErrorOutput());
     }
 }
diff --git a/tests/Examples/Generated/ContextContextWithTest.php b/tests/Examples/Generated/ContextContextWithTest.php
index 9deab6e1..f94a2973 100644
--- a/tests/Examples/Generated/ContextContextWithTest.php
+++ b/tests/Examples/Generated/ContextContextWithTest.php
@@ -13,10 +13,6 @@ public function test(): void
 
         $this->assertSame(0, $process->getExitCode());
         $this->assertStringEqualsFile(__FILE__ . '.output.txt', $process->getOutput());
-        if (file_exists(__FILE__ . '.err.txt')) {
-            $this->assertStringEqualsFile(__FILE__ . '.err.txt', $process->getErrorOutput());
-        } else {
-            $this->assertSame('', $process->getErrorOutput());
-        }
+        $this->assertSame('', $process->getErrorOutput());
     }
 }
diff --git a/tests/Examples/Generated/ContextGeneratorArg2Test.php b/tests/Examples/Generated/ContextGeneratorArg2Test.php
index bbf112be..22534e78 100644
--- a/tests/Examples/Generated/ContextGeneratorArg2Test.php
+++ b/tests/Examples/Generated/ContextGeneratorArg2Test.php
@@ -13,10 +13,6 @@ public function test(): void
 
         $this->assertSame(1, $process->getExitCode());
         $this->assertStringEqualsFile(__FILE__ . '.output.txt', $process->getOutput());
-        if (file_exists(__FILE__ . '.err.txt')) {
-            $this->assertStringEqualsFile(__FILE__ . '.err.txt', $process->getErrorOutput());
-        } else {
-            $this->assertSame('', $process->getErrorOutput());
-        }
+        $this->assertStringEqualsFile(__FILE__ . '.err.txt', $process->getErrorOutput());
     }
 }
diff --git a/tests/Examples/Generated/ContextGeneratorArgTest.php b/tests/Examples/Generated/ContextGeneratorArgTest.php
index 965066a2..416dba4a 100644
--- a/tests/Examples/Generated/ContextGeneratorArgTest.php
+++ b/tests/Examples/Generated/ContextGeneratorArgTest.php
@@ -13,10 +13,6 @@ public function test(): void
 
         $this->assertSame(1, $process->getExitCode());
         $this->assertStringEqualsFile(__FILE__ . '.output.txt', $process->getOutput());
-        if (file_exists(__FILE__ . '.err.txt')) {
-            $this->assertStringEqualsFile(__FILE__ . '.err.txt', $process->getErrorOutput());
-        } else {
-            $this->assertSame('', $process->getErrorOutput());
-        }
+        $this->assertStringEqualsFile(__FILE__ . '.err.txt', $process->getErrorOutput());
     }
 }
diff --git a/tests/Examples/Generated/ContextGeneratorNotCallableTest.php b/tests/Examples/Generated/ContextGeneratorNotCallableTest.php
index 22fc735c..c24b5ddb 100644
--- a/tests/Examples/Generated/ContextGeneratorNotCallableTest.php
+++ b/tests/Examples/Generated/ContextGeneratorNotCallableTest.php
@@ -13,10 +13,6 @@ public function test(): void
 
         $this->assertSame(1, $process->getExitCode());
         $this->assertStringEqualsFile(__FILE__ . '.output.txt', $process->getOutput());
-        if (file_exists(__FILE__ . '.err.txt')) {
-            $this->assertStringEqualsFile(__FILE__ . '.err.txt', $process->getErrorOutput());
-        } else {
-            $this->assertSame('', $process->getErrorOutput());
-        }
+        $this->assertStringEqualsFile(__FILE__ . '.err.txt', $process->getErrorOutput());
     }
 }
diff --git a/tests/Examples/Generated/EnabledInProduction.php b/tests/Examples/Generated/EnabledInProduction.php
index e26f6bb4..cd484b3a 100644
--- a/tests/Examples/Generated/EnabledInProduction.php
+++ b/tests/Examples/Generated/EnabledInProduction.php
@@ -13,10 +13,6 @@ public function test(): void
 
         $this->assertSame(0, $process->getExitCode());
         $this->assertStringEqualsFile(__FILE__ . '.output.txt', $process->getOutput());
-        if (file_exists(__FILE__ . '.err.txt')) {
-            $this->assertStringEqualsFile(__FILE__ . '.err.txt', $process->getErrorOutput());
-        } else {
-            $this->assertSame('', $process->getErrorOutput());
-        }
+        $this->assertSame('', $process->getErrorOutput());
     }
 }
diff --git a/tests/Examples/Generated/EnvEnvTest.php b/tests/Examples/Generated/EnvEnvTest.php
index 4bbdf384..2a12a253 100644
--- a/tests/Examples/Generated/EnvEnvTest.php
+++ b/tests/Examples/Generated/EnvEnvTest.php
@@ -13,10 +13,6 @@ public function test(): void
 
         $this->assertSame(0, $process->getExitCode());
         $this->assertStringEqualsFile(__FILE__ . '.output.txt', $process->getOutput());
-        if (file_exists(__FILE__ . '.err.txt')) {
-            $this->assertStringEqualsFile(__FILE__ . '.err.txt', $process->getErrorOutput());
-        } else {
-            $this->assertSame('', $process->getErrorOutput());
-        }
+        $this->assertSame('', $process->getErrorOutput());
     }
 }
diff --git a/tests/Examples/Generated/EventListenerMyTaskTest.php b/tests/Examples/Generated/EventListenerMyTaskTest.php
index e3db3435..2df5fc8a 100644
--- a/tests/Examples/Generated/EventListenerMyTaskTest.php
+++ b/tests/Examples/Generated/EventListenerMyTaskTest.php
@@ -13,10 +13,6 @@ public function test(): void
 
         $this->assertSame(0, $process->getExitCode());
         $this->assertStringEqualsFile(__FILE__ . '.output.txt', $process->getOutput());
-        if (file_exists(__FILE__ . '.err.txt')) {
-            $this->assertStringEqualsFile(__FILE__ . '.err.txt', $process->getErrorOutput());
-        } else {
-            $this->assertSame('', $process->getErrorOutput());
-        }
+        $this->assertSame('', $process->getErrorOutput());
     }
 }
diff --git a/tests/Examples/Generated/FailureAllowFailureTest.php b/tests/Examples/Generated/FailureAllowFailureTest.php
index 0604db5c..85af7e3a 100644
--- a/tests/Examples/Generated/FailureAllowFailureTest.php
+++ b/tests/Examples/Generated/FailureAllowFailureTest.php
@@ -13,10 +13,6 @@ public function test(): void
 
         $this->assertSame(0, $process->getExitCode());
         $this->assertStringEqualsFile(__FILE__ . '.output.txt', $process->getOutput());
-        if (file_exists(__FILE__ . '.err.txt')) {
-            $this->assertStringEqualsFile(__FILE__ . '.err.txt', $process->getErrorOutput());
-        } else {
-            $this->assertSame('', $process->getErrorOutput());
-        }
+        $this->assertStringEqualsFile(__FILE__ . '.err.txt', $process->getErrorOutput());
     }
 }
diff --git a/tests/Examples/Generated/FailureFailureTest.php b/tests/Examples/Generated/FailureFailureTest.php
index 9527b4bd..0757bdc7 100644
--- a/tests/Examples/Generated/FailureFailureTest.php
+++ b/tests/Examples/Generated/FailureFailureTest.php
@@ -13,10 +13,6 @@ public function test(): void
 
         $this->assertSame(1, $process->getExitCode());
         $this->assertStringEqualsFile(__FILE__ . '.output.txt', $process->getOutput());
-        if (file_exists(__FILE__ . '.err.txt')) {
-            $this->assertStringEqualsFile(__FILE__ . '.err.txt', $process->getErrorOutput());
-        } else {
-            $this->assertSame('', $process->getErrorOutput());
-        }
+        $this->assertStringEqualsFile(__FILE__ . '.err.txt', $process->getErrorOutput());
     }
 }
diff --git a/tests/Examples/Generated/FilesystemFilesystemTest.php b/tests/Examples/Generated/FilesystemFilesystemTest.php
index f36727d8..66dbe830 100644
--- a/tests/Examples/Generated/FilesystemFilesystemTest.php
+++ b/tests/Examples/Generated/FilesystemFilesystemTest.php
@@ -13,10 +13,6 @@ public function test(): void
 
         $this->assertSame(0, $process->getExitCode());
         $this->assertStringEqualsFile(__FILE__ . '.output.txt', $process->getOutput());
-        if (file_exists(__FILE__ . '.err.txt')) {
-            $this->assertStringEqualsFile(__FILE__ . '.err.txt', $process->getErrorOutput());
-        } else {
-            $this->assertSame('', $process->getErrorOutput());
-        }
+        $this->assertSame('', $process->getErrorOutput());
     }
 }
diff --git a/tests/Examples/Generated/FilesystemFindTest.php b/tests/Examples/Generated/FilesystemFindTest.php
index 9972dad4..af017e9e 100644
--- a/tests/Examples/Generated/FilesystemFindTest.php
+++ b/tests/Examples/Generated/FilesystemFindTest.php
@@ -13,10 +13,6 @@ public function test(): void
 
         $this->assertSame(0, $process->getExitCode());
         $this->assertStringEqualsFile(__FILE__ . '.output.txt', $process->getOutput());
-        if (file_exists(__FILE__ . '.err.txt')) {
-            $this->assertStringEqualsFile(__FILE__ . '.err.txt', $process->getErrorOutput());
-        } else {
-            $this->assertSame('', $process->getErrorOutput());
-        }
+        $this->assertSame('', $process->getErrorOutput());
     }
 }
diff --git a/tests/Examples/Generated/FooBarTest.php b/tests/Examples/Generated/FooBarTest.php
index e15b30be..75669fa0 100644
--- a/tests/Examples/Generated/FooBarTest.php
+++ b/tests/Examples/Generated/FooBarTest.php
@@ -13,10 +13,6 @@ public function test(): void
 
         $this->assertSame(0, $process->getExitCode());
         $this->assertStringEqualsFile(__FILE__ . '.output.txt', $process->getOutput());
-        if (file_exists(__FILE__ . '.err.txt')) {
-            $this->assertStringEqualsFile(__FILE__ . '.err.txt', $process->getErrorOutput());
-        } else {
-            $this->assertSame('', $process->getErrorOutput());
-        }
+        $this->assertSame('', $process->getErrorOutput());
     }
 }
diff --git a/tests/Examples/Generated/FooFooTest.php b/tests/Examples/Generated/FooFooTest.php
index 00610096..23218936 100644
--- a/tests/Examples/Generated/FooFooTest.php
+++ b/tests/Examples/Generated/FooFooTest.php
@@ -13,10 +13,6 @@ public function test(): void
 
         $this->assertSame(0, $process->getExitCode());
         $this->assertStringEqualsFile(__FILE__ . '.output.txt', $process->getOutput());
-        if (file_exists(__FILE__ . '.err.txt')) {
-            $this->assertStringEqualsFile(__FILE__ . '.err.txt', $process->getErrorOutput());
-        } else {
-            $this->assertSame('', $process->getErrorOutput());
-        }
+        $this->assertSame('', $process->getErrorOutput());
     }
 }
diff --git a/tests/Examples/Generated/HelloTest.php b/tests/Examples/Generated/HelloTest.php
index 0905d4cb..47d8bd76 100644
--- a/tests/Examples/Generated/HelloTest.php
+++ b/tests/Examples/Generated/HelloTest.php
@@ -13,10 +13,6 @@ public function test(): void
 
         $this->assertSame(0, $process->getExitCode());
         $this->assertStringEqualsFile(__FILE__ . '.output.txt', $process->getOutput());
-        if (file_exists(__FILE__ . '.err.txt')) {
-            $this->assertStringEqualsFile(__FILE__ . '.err.txt', $process->getErrorOutput());
-        } else {
-            $this->assertSame('', $process->getErrorOutput());
-        }
+        $this->assertSame('', $process->getErrorOutput());
     }
 }
diff --git a/tests/Examples/Generated/HttpRequestTest.php b/tests/Examples/Generated/HttpRequestTest.php
index 62cb77d1..439a8336 100644
--- a/tests/Examples/Generated/HttpRequestTest.php
+++ b/tests/Examples/Generated/HttpRequestTest.php
@@ -13,10 +13,6 @@ public function test(): void
 
         $this->assertSame(0, $process->getExitCode());
         $this->assertStringEqualsFile(__FILE__ . '.output.txt', $process->getOutput());
-        if (file_exists(__FILE__ . '.err.txt')) {
-            $this->assertStringEqualsFile(__FILE__ . '.err.txt', $process->getErrorOutput());
-        } else {
-            $this->assertSame('', $process->getErrorOutput());
-        }
+        $this->assertSame('', $process->getErrorOutput());
     }
 }
diff --git a/tests/Examples/Generated/ImportComposerSourceTest.php b/tests/Examples/Generated/ImportComposerSourceTest.php
index 86cc9e6d..3266d42e 100644
--- a/tests/Examples/Generated/ImportComposerSourceTest.php
+++ b/tests/Examples/Generated/ImportComposerSourceTest.php
@@ -13,10 +13,6 @@ public function test(): void
 
         $this->assertSame(1, $process->getExitCode());
         $this->assertStringEqualsFile(__FILE__ . '.output.txt', $process->getOutput());
-        if (file_exists(__FILE__ . '.err.txt')) {
-            $this->assertStringEqualsFile(__FILE__ . '.err.txt', $process->getErrorOutput());
-        } else {
-            $this->assertSame('', $process->getErrorOutput());
-        }
+        $this->assertStringEqualsFile(__FILE__ . '.err.txt', $process->getErrorOutput());
     }
 }
diff --git a/tests/Examples/Generated/ImportFileNotExistTest.php b/tests/Examples/Generated/ImportFileNotExistTest.php
index 20252b38..44a8dcaa 100644
--- a/tests/Examples/Generated/ImportFileNotExistTest.php
+++ b/tests/Examples/Generated/ImportFileNotExistTest.php
@@ -13,10 +13,6 @@ public function test(): void
 
         $this->assertSame(1, $process->getExitCode());
         $this->assertStringEqualsFile(__FILE__ . '.output.txt', $process->getOutput());
-        if (file_exists(__FILE__ . '.err.txt')) {
-            $this->assertStringEqualsFile(__FILE__ . '.err.txt', $process->getErrorOutput());
-        } else {
-            $this->assertSame('', $process->getErrorOutput());
-        }
+        $this->assertStringEqualsFile(__FILE__ . '.err.txt', $process->getErrorOutput());
     }
 }
diff --git a/tests/Examples/Generated/ImportInvalidFormatTest.php b/tests/Examples/Generated/ImportInvalidFormatTest.php
index f5365499..bb3079da 100644
--- a/tests/Examples/Generated/ImportInvalidFormatTest.php
+++ b/tests/Examples/Generated/ImportInvalidFormatTest.php
@@ -13,10 +13,6 @@ public function test(): void
 
         $this->assertSame(1, $process->getExitCode());
         $this->assertStringEqualsFile(__FILE__ . '.output.txt', $process->getOutput());
-        if (file_exists(__FILE__ . '.err.txt')) {
-            $this->assertStringEqualsFile(__FILE__ . '.err.txt', $process->getErrorOutput());
-        } else {
-            $this->assertSame('', $process->getErrorOutput());
-        }
+        $this->assertStringEqualsFile(__FILE__ . '.err.txt', $process->getErrorOutput());
     }
 }
diff --git a/tests/Examples/Generated/ImportInvalidImportTest.php b/tests/Examples/Generated/ImportInvalidImportTest.php
index ac35bb25..6ed9589e 100644
--- a/tests/Examples/Generated/ImportInvalidImportTest.php
+++ b/tests/Examples/Generated/ImportInvalidImportTest.php
@@ -13,10 +13,6 @@ public function test(): void
 
         $this->assertSame(1, $process->getExitCode());
         $this->assertStringEqualsFile(__FILE__ . '.output.txt', $process->getOutput());
-        if (file_exists(__FILE__ . '.err.txt')) {
-            $this->assertStringEqualsFile(__FILE__ . '.err.txt', $process->getErrorOutput());
-        } else {
-            $this->assertSame('', $process->getErrorOutput());
-        }
+        $this->assertStringEqualsFile(__FILE__ . '.err.txt', $process->getErrorOutput());
     }
 }
diff --git a/tests/Examples/Generated/ImportInvalidPackageTest.php b/tests/Examples/Generated/ImportInvalidPackageTest.php
index 157427a0..22e87f97 100644
--- a/tests/Examples/Generated/ImportInvalidPackageTest.php
+++ b/tests/Examples/Generated/ImportInvalidPackageTest.php
@@ -13,10 +13,6 @@ public function test(): void
 
         $this->assertSame(1, $process->getExitCode());
         $this->assertStringEqualsFile(__FILE__ . '.output.txt', $process->getOutput());
-        if (file_exists(__FILE__ . '.err.txt')) {
-            $this->assertStringEqualsFile(__FILE__ . '.err.txt', $process->getErrorOutput());
-        } else {
-            $this->assertSame('', $process->getErrorOutput());
-        }
+        $this->assertStringEqualsFile(__FILE__ . '.err.txt', $process->getErrorOutput());
     }
 }
diff --git a/tests/Examples/Generated/ImportSamePackageDifferentVersionTest.php b/tests/Examples/Generated/ImportSamePackageDifferentVersionTest.php
index 44f27478..d1546256 100644
--- a/tests/Examples/Generated/ImportSamePackageDifferentVersionTest.php
+++ b/tests/Examples/Generated/ImportSamePackageDifferentVersionTest.php
@@ -13,10 +13,6 @@ public function test(): void
 
         $this->assertSame(1, $process->getExitCode());
         $this->assertStringEqualsFile(__FILE__ . '.output.txt', $process->getOutput());
-        if (file_exists(__FILE__ . '.err.txt')) {
-            $this->assertStringEqualsFile(__FILE__ . '.err.txt', $process->getErrorOutput());
-        } else {
-            $this->assertSame('', $process->getErrorOutput());
-        }
+        $this->assertStringEqualsFile(__FILE__ . '.err.txt', $process->getErrorOutput());
     }
 }
diff --git a/tests/Examples/Generated/LayoutWithFolder.php b/tests/Examples/Generated/LayoutWithFolder.php
index 3456d7bb..c507b094 100644
--- a/tests/Examples/Generated/LayoutWithFolder.php
+++ b/tests/Examples/Generated/LayoutWithFolder.php
@@ -13,10 +13,6 @@ public function test(): void
 
         $this->assertSame(0, $process->getExitCode());
         $this->assertStringEqualsFile(__FILE__ . '.output.txt', $process->getOutput());
-        if (file_exists(__FILE__ . '.err.txt')) {
-            $this->assertStringEqualsFile(__FILE__ . '.err.txt', $process->getErrorOutput());
-        } else {
-            $this->assertSame('', $process->getErrorOutput());
-        }
+        $this->assertSame('', $process->getErrorOutput());
     }
 }
diff --git a/tests/Examples/Generated/LayoutWithOldFolder.php b/tests/Examples/Generated/LayoutWithOldFolder.php
index f29ae2ba..e71c4b62 100644
--- a/tests/Examples/Generated/LayoutWithOldFolder.php
+++ b/tests/Examples/Generated/LayoutWithOldFolder.php
@@ -13,10 +13,6 @@ public function test(): void
 
         $this->assertSame(0, $process->getExitCode());
         $this->assertStringEqualsFile(__FILE__ . '.output.txt', $process->getOutput());
-        if (file_exists(__FILE__ . '.err.txt')) {
-            $this->assertStringEqualsFile(__FILE__ . '.err.txt', $process->getErrorOutput());
-        } else {
-            $this->assertSame('', $process->getErrorOutput());
-        }
+        $this->assertSame('', $process->getErrorOutput());
     }
 }
diff --git a/tests/Examples/Generated/ListTest.php b/tests/Examples/Generated/ListTest.php
index 637797af..2ce94c33 100644
--- a/tests/Examples/Generated/ListTest.php
+++ b/tests/Examples/Generated/ListTest.php
@@ -17,10 +17,6 @@ public function test(): void
 
         $this->assertSame(0, $process->getExitCode());
         $this->assertStringEqualsFile(__FILE__ . '.output.txt', $process->getOutput());
-        if (file_exists(__FILE__ . '.err.txt')) {
-            $this->assertStringEqualsFile(__FILE__ . '.err.txt', $process->getErrorOutput());
-        } else {
-            $this->assertSame('', $process->getErrorOutput());
-        }
+        $this->assertSame('', $process->getErrorOutput());
     }
 }
diff --git a/tests/Examples/Generated/NewProjectInitTest.php b/tests/Examples/Generated/NewProjectInitTest.php
index 8e861631..cf244aaa 100644
--- a/tests/Examples/Generated/NewProjectInitTest.php
+++ b/tests/Examples/Generated/NewProjectInitTest.php
@@ -13,10 +13,6 @@ public function test(): void
 
         $this->assertSame(0, $process->getExitCode());
         $this->assertStringEqualsFile(__FILE__ . '.output.txt', $process->getOutput());
-        if (file_exists(__FILE__ . '.err.txt')) {
-            $this->assertStringEqualsFile(__FILE__ . '.err.txt', $process->getErrorOutput());
-        } else {
-            $this->assertSame('', $process->getErrorOutput());
-        }
+        $this->assertSame('', $process->getErrorOutput());
     }
 }
diff --git a/tests/Examples/Generated/NewProjectTest.php b/tests/Examples/Generated/NewProjectTest.php
index 11474bc9..37d3d666 100644
--- a/tests/Examples/Generated/NewProjectTest.php
+++ b/tests/Examples/Generated/NewProjectTest.php
@@ -13,10 +13,6 @@ public function test(): void
 
         $this->assertSame(0, $process->getExitCode());
         $this->assertStringEqualsFile(__FILE__ . '.output.txt', $process->getOutput());
-        if (file_exists(__FILE__ . '.err.txt')) {
-            $this->assertStringEqualsFile(__FILE__ . '.err.txt', $process->getErrorOutput());
-        } else {
-            $this->assertSame('', $process->getErrorOutput());
-        }
+        $this->assertSame('', $process->getErrorOutput());
     }
 }
diff --git a/tests/Examples/Generated/NoConfigCompletionTest.php b/tests/Examples/Generated/NoConfigCompletionTest.php
index 3fa316e5..fdebcf94 100644
--- a/tests/Examples/Generated/NoConfigCompletionTest.php
+++ b/tests/Examples/Generated/NoConfigCompletionTest.php
@@ -13,10 +13,6 @@ public function test(): void
 
         $this->assertSame(0, $process->getExitCode());
         $this->assertStringEqualsFile(__FILE__ . '.output.txt', $process->getOutput());
-        if (file_exists(__FILE__ . '.err.txt')) {
-            $this->assertStringEqualsFile(__FILE__ . '.err.txt', $process->getErrorOutput());
-        } else {
-            $this->assertSame('', $process->getErrorOutput());
-        }
+        $this->assertSame('', $process->getErrorOutput());
     }
 }
diff --git a/tests/Examples/Generated/NoConfigUnknownTest.php b/tests/Examples/Generated/NoConfigUnknownTest.php
index 589ecc84..a895916a 100644
--- a/tests/Examples/Generated/NoConfigUnknownTest.php
+++ b/tests/Examples/Generated/NoConfigUnknownTest.php
@@ -13,10 +13,6 @@ public function test(): void
 
         $this->assertSame(1, $process->getExitCode());
         $this->assertStringEqualsFile(__FILE__ . '.output.txt', $process->getOutput());
-        if (file_exists(__FILE__ . '.err.txt')) {
-            $this->assertStringEqualsFile(__FILE__ . '.err.txt', $process->getErrorOutput());
-        } else {
-            $this->assertSame('', $process->getErrorOutput());
-        }
+        $this->assertSame('', $process->getErrorOutput());
     }
 }
diff --git a/tests/Examples/Generated/NoConfigUnknownWithArgsTest.php b/tests/Examples/Generated/NoConfigUnknownWithArgsTest.php
index 18813946..7a64bf6c 100644
--- a/tests/Examples/Generated/NoConfigUnknownWithArgsTest.php
+++ b/tests/Examples/Generated/NoConfigUnknownWithArgsTest.php
@@ -13,10 +13,6 @@ public function test(): void
 
         $this->assertSame(1, $process->getExitCode());
         $this->assertStringEqualsFile(__FILE__ . '.output.txt', $process->getOutput());
-        if (file_exists(__FILE__ . '.err.txt')) {
-            $this->assertStringEqualsFile(__FILE__ . '.err.txt', $process->getErrorOutput());
-        } else {
-            $this->assertSame('', $process->getErrorOutput());
-        }
+        $this->assertSame('', $process->getErrorOutput());
     }
 }
diff --git a/tests/Examples/Generated/NoDefaultContextTest.php b/tests/Examples/Generated/NoDefaultContextTest.php
index 83bd4059..266d3f58 100644
--- a/tests/Examples/Generated/NoDefaultContextTest.php
+++ b/tests/Examples/Generated/NoDefaultContextTest.php
@@ -13,10 +13,6 @@ public function test(): void
 
         $this->assertSame(1, $process->getExitCode());
         $this->assertStringEqualsFile(__FILE__ . '.output.txt', $process->getOutput());
-        if (file_exists(__FILE__ . '.err.txt')) {
-            $this->assertStringEqualsFile(__FILE__ . '.err.txt', $process->getErrorOutput());
-        } else {
-            $this->assertSame('', $process->getErrorOutput());
-        }
+        $this->assertStringEqualsFile(__FILE__ . '.err.txt', $process->getErrorOutput());
     }
 }
diff --git a/tests/Examples/Generated/NoNamespaceTest.php b/tests/Examples/Generated/NoNamespaceTest.php
index f438bb6e..6571c530 100644
--- a/tests/Examples/Generated/NoNamespaceTest.php
+++ b/tests/Examples/Generated/NoNamespaceTest.php
@@ -13,10 +13,6 @@ public function test(): void
 
         $this->assertSame(0, $process->getExitCode());
         $this->assertStringEqualsFile(__FILE__ . '.output.txt', $process->getOutput());
-        if (file_exists(__FILE__ . '.err.txt')) {
-            $this->assertStringEqualsFile(__FILE__ . '.err.txt', $process->getErrorOutput());
-        } else {
-            $this->assertSame('', $process->getErrorOutput());
-        }
+        $this->assertSame('', $process->getErrorOutput());
     }
 }
diff --git a/tests/Examples/Generated/NotRenameRenamedTest.php b/tests/Examples/Generated/NotRenameRenamedTest.php
index 4ac92e3b..471ac364 100644
--- a/tests/Examples/Generated/NotRenameRenamedTest.php
+++ b/tests/Examples/Generated/NotRenameRenamedTest.php
@@ -13,10 +13,6 @@ public function test(): void
 
         $this->assertSame(0, $process->getExitCode());
         $this->assertStringEqualsFile(__FILE__ . '.output.txt', $process->getOutput());
-        if (file_exists(__FILE__ . '.err.txt')) {
-            $this->assertStringEqualsFile(__FILE__ . '.err.txt', $process->getErrorOutput());
-        } else {
-            $this->assertSame('', $process->getErrorOutput());
-        }
+        $this->assertSame('', $process->getErrorOutput());
     }
 }
diff --git a/tests/Examples/Generated/NotifyNotifyOnFinishTest.php b/tests/Examples/Generated/NotifyNotifyOnFinishTest.php
index 1b8014ce..686d37a8 100644
--- a/tests/Examples/Generated/NotifyNotifyOnFinishTest.php
+++ b/tests/Examples/Generated/NotifyNotifyOnFinishTest.php
@@ -13,10 +13,6 @@ public function test(): void
 
         $this->assertSame(0, $process->getExitCode());
         $this->assertStringEqualsFile(__FILE__ . '.output.txt', $process->getOutput());
-        if (file_exists(__FILE__ . '.err.txt')) {
-            $this->assertStringEqualsFile(__FILE__ . '.err.txt', $process->getErrorOutput());
-        } else {
-            $this->assertSame('', $process->getErrorOutput());
-        }
+        $this->assertSame('', $process->getErrorOutput());
     }
 }
diff --git a/tests/Examples/Generated/NotifySendNotifyTest.php b/tests/Examples/Generated/NotifySendNotifyTest.php
index c0413c81..3e147126 100644
--- a/tests/Examples/Generated/NotifySendNotifyTest.php
+++ b/tests/Examples/Generated/NotifySendNotifyTest.php
@@ -13,10 +13,6 @@ public function test(): void
 
         $this->assertSame(0, $process->getExitCode());
         $this->assertStringEqualsFile(__FILE__ . '.output.txt', $process->getOutput());
-        if (file_exists(__FILE__ . '.err.txt')) {
-            $this->assertStringEqualsFile(__FILE__ . '.err.txt', $process->getErrorOutput());
-        } else {
-            $this->assertSame('', $process->getErrorOutput());
-        }
+        $this->assertSame('', $process->getErrorOutput());
     }
 }
diff --git a/tests/Examples/Generated/OutputOutputTest.php b/tests/Examples/Generated/OutputOutputTest.php
index 002ed16b..5e8413c3 100644
--- a/tests/Examples/Generated/OutputOutputTest.php
+++ b/tests/Examples/Generated/OutputOutputTest.php
@@ -13,10 +13,6 @@ public function test(): void
 
         $this->assertSame(1, $process->getExitCode());
         $this->assertStringEqualsFile(__FILE__ . '.output.txt', $process->getOutput());
-        if (file_exists(__FILE__ . '.err.txt')) {
-            $this->assertStringEqualsFile(__FILE__ . '.err.txt', $process->getErrorOutput());
-        } else {
-            $this->assertSame('', $process->getErrorOutput());
-        }
+        $this->assertStringEqualsFile(__FILE__ . '.err.txt', $process->getErrorOutput());
     }
 }
diff --git a/tests/Examples/Generated/ParallelExceptionTest.php b/tests/Examples/Generated/ParallelExceptionTest.php
index 62324cd2..e51e405d 100644
--- a/tests/Examples/Generated/ParallelExceptionTest.php
+++ b/tests/Examples/Generated/ParallelExceptionTest.php
@@ -13,10 +13,6 @@ public function test(): void
 
         $this->assertSame(1, $process->getExitCode());
         $this->assertStringEqualsFile(__FILE__ . '.output.txt', $process->getOutput());
-        if (file_exists(__FILE__ . '.err.txt')) {
-            $this->assertStringEqualsFile(__FILE__ . '.err.txt', $process->getErrorOutput());
-        } else {
-            $this->assertSame('', $process->getErrorOutput());
-        }
+        $this->assertStringEqualsFile(__FILE__ . '.err.txt', $process->getErrorOutput());
     }
 }
diff --git a/tests/Examples/Generated/ParallelSleepTest.php b/tests/Examples/Generated/ParallelSleepTest.php
index b8f935f5..2655843a 100644
--- a/tests/Examples/Generated/ParallelSleepTest.php
+++ b/tests/Examples/Generated/ParallelSleepTest.php
@@ -13,10 +13,6 @@ public function test(): void
 
         $this->assertSame(0, $process->getExitCode());
         $this->assertStringEqualsFile(__FILE__ . '.output.txt', $process->getOutput());
-        if (file_exists(__FILE__ . '.err.txt')) {
-            $this->assertStringEqualsFile(__FILE__ . '.err.txt', $process->getErrorOutput());
-        } else {
-            $this->assertSame('', $process->getErrorOutput());
-        }
+        $this->assertSame('', $process->getErrorOutput());
     }
 }
diff --git a/tests/Examples/Generated/QuietQuietTest.php b/tests/Examples/Generated/QuietQuietTest.php
index 68755fbc..b4201b0b 100644
--- a/tests/Examples/Generated/QuietQuietTest.php
+++ b/tests/Examples/Generated/QuietQuietTest.php
@@ -13,10 +13,6 @@ public function test(): void
 
         $this->assertSame(0, $process->getExitCode());
         $this->assertStringEqualsFile(__FILE__ . '.output.txt', $process->getOutput());
-        if (file_exists(__FILE__ . '.err.txt')) {
-            $this->assertStringEqualsFile(__FILE__ . '.err.txt', $process->getErrorOutput());
-        } else {
-            $this->assertSame('', $process->getErrorOutput());
-        }
+        $this->assertSame('', $process->getErrorOutput());
     }
 }
diff --git a/tests/Examples/Generated/RunTestFileTest.php b/tests/Examples/Generated/RunTestFileTest.php
index 4411daa0..253b9ffd 100644
--- a/tests/Examples/Generated/RunTestFileTest.php
+++ b/tests/Examples/Generated/RunTestFileTest.php
@@ -13,10 +13,6 @@ public function test(): void
 
         $this->assertSame(1, $process->getExitCode());
         $this->assertStringEqualsFile(__FILE__ . '.output.txt', $process->getOutput());
-        if (file_exists(__FILE__ . '.err.txt')) {
-            $this->assertStringEqualsFile(__FILE__ . '.err.txt', $process->getErrorOutput());
-        } else {
-            $this->assertSame('', $process->getErrorOutput());
-        }
+        $this->assertSame('', $process->getErrorOutput());
     }
 }
diff --git a/tests/Examples/Generated/RunVariablesTest.php b/tests/Examples/Generated/RunVariablesTest.php
index 3e8ecb16..3ef921c2 100644
--- a/tests/Examples/Generated/RunVariablesTest.php
+++ b/tests/Examples/Generated/RunVariablesTest.php
@@ -13,10 +13,6 @@ public function test(): void
 
         $this->assertSame(0, $process->getExitCode());
         $this->assertStringEqualsFile(__FILE__ . '.output.txt', $process->getOutput());
-        if (file_exists(__FILE__ . '.err.txt')) {
-            $this->assertStringEqualsFile(__FILE__ . '.err.txt', $process->getErrorOutput());
-        } else {
-            $this->assertSame('', $process->getErrorOutput());
-        }
+        $this->assertSame('', $process->getErrorOutput());
     }
 }
diff --git a/tests/Examples/Generated/RunWhoamiTest.php b/tests/Examples/Generated/RunWhoamiTest.php
index ee5674d1..f6d69ebb 100644
--- a/tests/Examples/Generated/RunWhoamiTest.php
+++ b/tests/Examples/Generated/RunWhoamiTest.php
@@ -13,10 +13,6 @@ public function test(): void
 
         $this->assertSame(0, $process->getExitCode());
         $this->assertStringEqualsFile(__FILE__ . '.output.txt', $process->getOutput());
-        if (file_exists(__FILE__ . '.err.txt')) {
-            $this->assertStringEqualsFile(__FILE__ . '.err.txt', $process->getErrorOutput());
-        } else {
-            $this->assertSame('', $process->getErrorOutput());
-        }
+        $this->assertSame('', $process->getErrorOutput());
     }
 }
diff --git a/tests/Examples/Generated/RunWithProcessHelperTest.php b/tests/Examples/Generated/RunWithProcessHelperTest.php
index 5824c203..7f1c54e0 100644
--- a/tests/Examples/Generated/RunWithProcessHelperTest.php
+++ b/tests/Examples/Generated/RunWithProcessHelperTest.php
@@ -13,10 +13,6 @@ public function test(): void
 
         $this->assertSame(0, $process->getExitCode());
         $this->assertStringEqualsFile(__FILE__ . '.output.txt', $process->getOutput());
-        if (file_exists(__FILE__ . '.err.txt')) {
-            $this->assertStringEqualsFile(__FILE__ . '.err.txt', $process->getErrorOutput());
-        } else {
-            $this->assertSame('', $process->getErrorOutput());
-        }
+        $this->assertSame('', $process->getErrorOutput());
     }
 }
diff --git a/tests/Examples/Generated/ShellBashTest.php b/tests/Examples/Generated/ShellBashTest.php
index d65e7af2..8ca0ff97 100644
--- a/tests/Examples/Generated/ShellBashTest.php
+++ b/tests/Examples/Generated/ShellBashTest.php
@@ -13,10 +13,6 @@ public function test(): void
 
         $this->assertSame(1, $process->getExitCode());
         $this->assertStringEqualsFile(__FILE__ . '.output.txt', $process->getOutput());
-        if (file_exists(__FILE__ . '.err.txt')) {
-            $this->assertStringEqualsFile(__FILE__ . '.err.txt', $process->getErrorOutput());
-        } else {
-            $this->assertSame('', $process->getErrorOutput());
-        }
+        $this->assertStringEqualsFile(__FILE__ . '.err.txt', $process->getErrorOutput());
     }
 }
diff --git a/tests/Examples/Generated/ShellShTest.php b/tests/Examples/Generated/ShellShTest.php
index 877d9394..4c1b2089 100644
--- a/tests/Examples/Generated/ShellShTest.php
+++ b/tests/Examples/Generated/ShellShTest.php
@@ -13,10 +13,6 @@ public function test(): void
 
         $this->assertSame(1, $process->getExitCode());
         $this->assertStringEqualsFile(__FILE__ . '.output.txt', $process->getOutput());
-        if (file_exists(__FILE__ . '.err.txt')) {
-            $this->assertStringEqualsFile(__FILE__ . '.err.txt', $process->getErrorOutput());
-        } else {
-            $this->assertSame('', $process->getErrorOutput());
-        }
+        $this->assertStringEqualsFile(__FILE__ . '.err.txt', $process->getErrorOutput());
     }
 }
diff --git a/tests/Examples/Generated/SignalSigusr2Test.php b/tests/Examples/Generated/SignalSigusr2Test.php
index 59fcd5d6..bac195a6 100644
--- a/tests/Examples/Generated/SignalSigusr2Test.php
+++ b/tests/Examples/Generated/SignalSigusr2Test.php
@@ -13,10 +13,6 @@ public function test(): void
 
         $this->assertSame(0, $process->getExitCode());
         $this->assertStringEqualsFile(__FILE__ . '.output.txt', $process->getOutput());
-        if (file_exists(__FILE__ . '.err.txt')) {
-            $this->assertStringEqualsFile(__FILE__ . '.err.txt', $process->getErrorOutput());
-        } else {
-            $this->assertSame('', $process->getErrorOutput());
-        }
+        $this->assertSame('', $process->getErrorOutput());
     }
 }
diff --git a/tests/Examples/Generated/SymfonyGreetTest.php b/tests/Examples/Generated/SymfonyGreetTest.php
index 80c247c5..ead5c628 100644
--- a/tests/Examples/Generated/SymfonyGreetTest.php
+++ b/tests/Examples/Generated/SymfonyGreetTest.php
@@ -17,10 +17,6 @@ public function test(): void
 
         $this->assertSame(0, $process->getExitCode());
         $this->assertStringEqualsFile(__FILE__ . '.output.txt', $process->getOutput());
-        if (file_exists(__FILE__ . '.err.txt')) {
-            $this->assertStringEqualsFile(__FILE__ . '.err.txt', $process->getErrorOutput());
-        } else {
-            $this->assertSame('', $process->getErrorOutput());
-        }
+        $this->assertSame('', $process->getErrorOutput());
     }
 }
diff --git a/tests/Examples/Generated/SymfonyHelloTest.php b/tests/Examples/Generated/SymfonyHelloTest.php
index 81a2d60a..5e187510 100644
--- a/tests/Examples/Generated/SymfonyHelloTest.php
+++ b/tests/Examples/Generated/SymfonyHelloTest.php
@@ -17,10 +17,6 @@ public function test(): void
 
         $this->assertSame(0, $process->getExitCode());
         $this->assertStringEqualsFile(__FILE__ . '.output.txt', $process->getOutput());
-        if (file_exists(__FILE__ . '.err.txt')) {
-            $this->assertStringEqualsFile(__FILE__ . '.err.txt', $process->getErrorOutput());
-        } else {
-            $this->assertSame('', $process->getErrorOutput());
-        }
+        $this->assertSame('', $process->getErrorOutput());
     }
 }
diff --git a/tests/Examples/Generated/TwoDefaultContextTest.php b/tests/Examples/Generated/TwoDefaultContextTest.php
index 8a0128e7..ca84a2a2 100644
--- a/tests/Examples/Generated/TwoDefaultContextTest.php
+++ b/tests/Examples/Generated/TwoDefaultContextTest.php
@@ -13,10 +13,6 @@ public function test(): void
 
         $this->assertSame(1, $process->getExitCode());
         $this->assertStringEqualsFile(__FILE__ . '.output.txt', $process->getOutput());
-        if (file_exists(__FILE__ . '.err.txt')) {
-            $this->assertStringEqualsFile(__FILE__ . '.err.txt', $process->getErrorOutput());
-        } else {
-            $this->assertSame('', $process->getErrorOutput());
-        }
+        $this->assertStringEqualsFile(__FILE__ . '.err.txt', $process->getErrorOutput());
     }
 }
diff --git a/tests/Examples/Generated/VersionGuardMinVersionCheckFailTest.php b/tests/Examples/Generated/VersionGuardMinVersionCheckFailTest.php
index 1ad88d14..989b464a 100644
--- a/tests/Examples/Generated/VersionGuardMinVersionCheckFailTest.php
+++ b/tests/Examples/Generated/VersionGuardMinVersionCheckFailTest.php
@@ -13,10 +13,6 @@ public function test(): void
 
         $this->assertSame(1, $process->getExitCode());
         $this->assertStringEqualsFile(__FILE__ . '.output.txt', $process->getOutput());
-        if (file_exists(__FILE__ . '.err.txt')) {
-            $this->assertStringEqualsFile(__FILE__ . '.err.txt', $process->getErrorOutput());
-        } else {
-            $this->assertSame('', $process->getErrorOutput());
-        }
+        $this->assertStringEqualsFile(__FILE__ . '.err.txt', $process->getErrorOutput());
     }
 }
diff --git a/tests/Examples/Generated/VersionGuardMinVersionCheckTest.php b/tests/Examples/Generated/VersionGuardMinVersionCheckTest.php
index d136d870..38fa323f 100644
--- a/tests/Examples/Generated/VersionGuardMinVersionCheckTest.php
+++ b/tests/Examples/Generated/VersionGuardMinVersionCheckTest.php
@@ -13,10 +13,6 @@ public function test(): void
 
         $this->assertSame(0, $process->getExitCode());
         $this->assertStringEqualsFile(__FILE__ . '.output.txt', $process->getOutput());
-        if (file_exists(__FILE__ . '.err.txt')) {
-            $this->assertStringEqualsFile(__FILE__ . '.err.txt', $process->getErrorOutput());
-        } else {
-            $this->assertSame('', $process->getErrorOutput());
-        }
+        $this->assertSame('', $process->getErrorOutput());
     }
 }
diff --git a/tests/Examples/Generated/WaitForCustomWaitForTaskTest.php b/tests/Examples/Generated/WaitForCustomWaitForTaskTest.php
index 8025ab34..84568e6c 100644
--- a/tests/Examples/Generated/WaitForCustomWaitForTaskTest.php
+++ b/tests/Examples/Generated/WaitForCustomWaitForTaskTest.php
@@ -13,10 +13,6 @@ public function test(): void
 
         $this->assertSame(0, $process->getExitCode());
         $this->assertStringEqualsFile(__FILE__ . '.output.txt', $process->getOutput());
-        if (file_exists(__FILE__ . '.err.txt')) {
-            $this->assertStringEqualsFile(__FILE__ . '.err.txt', $process->getErrorOutput());
-        } else {
-            $this->assertSame('', $process->getErrorOutput());
-        }
+        $this->assertSame('', $process->getErrorOutput());
     }
 }
diff --git a/tests/Examples/Generated/WaitForWaitForDockerContainerTaskTest.php b/tests/Examples/Generated/WaitForWaitForDockerContainerTaskTest.php
index 439b73b3..e2e555be 100644
--- a/tests/Examples/Generated/WaitForWaitForDockerContainerTaskTest.php
+++ b/tests/Examples/Generated/WaitForWaitForDockerContainerTaskTest.php
@@ -13,10 +13,6 @@ public function test(): void
 
         $this->assertSame(0, $process->getExitCode());
         $this->assertStringEqualsFile(__FILE__ . '.output.txt', $process->getOutput());
-        if (file_exists(__FILE__ . '.err.txt')) {
-            $this->assertStringEqualsFile(__FILE__ . '.err.txt', $process->getErrorOutput());
-        } else {
-            $this->assertSame('', $process->getErrorOutput());
-        }
+        $this->assertSame('', $process->getErrorOutput());
     }
 }
diff --git a/tests/Examples/Generated/WaitForWaitForPortTaskTest.php b/tests/Examples/Generated/WaitForWaitForPortTaskTest.php
index 005a1fa0..0e39c089 100644
--- a/tests/Examples/Generated/WaitForWaitForPortTaskTest.php
+++ b/tests/Examples/Generated/WaitForWaitForPortTaskTest.php
@@ -13,10 +13,6 @@ public function test(): void
 
         $this->assertSame(0, $process->getExitCode());
         $this->assertStringEqualsFile(__FILE__ . '.output.txt', $process->getOutput());
-        if (file_exists(__FILE__ . '.err.txt')) {
-            $this->assertStringEqualsFile(__FILE__ . '.err.txt', $process->getErrorOutput());
-        } else {
-            $this->assertSame('', $process->getErrorOutput());
-        }
+        $this->assertSame('', $process->getErrorOutput());
     }
 }
diff --git a/tests/Examples/Generated/WaitForWaitForUrlTaskTest.php b/tests/Examples/Generated/WaitForWaitForUrlTaskTest.php
index f58413f7..b0c7638b 100644
--- a/tests/Examples/Generated/WaitForWaitForUrlTaskTest.php
+++ b/tests/Examples/Generated/WaitForWaitForUrlTaskTest.php
@@ -13,10 +13,6 @@ public function test(): void
 
         $this->assertSame(0, $process->getExitCode());
         $this->assertStringEqualsFile(__FILE__ . '.output.txt', $process->getOutput());
-        if (file_exists(__FILE__ . '.err.txt')) {
-            $this->assertStringEqualsFile(__FILE__ . '.err.txt', $process->getErrorOutput());
-        } else {
-            $this->assertSame('', $process->getErrorOutput());
-        }
+        $this->assertSame('', $process->getErrorOutput());
     }
 }
diff --git a/tests/Examples/Generated/WaitForWaitForUrlWithSpecificResponseContentAndStatusTest.php b/tests/Examples/Generated/WaitForWaitForUrlWithSpecificResponseContentAndStatusTest.php
index e42078ce..7c198e3a 100644
--- a/tests/Examples/Generated/WaitForWaitForUrlWithSpecificResponseContentAndStatusTest.php
+++ b/tests/Examples/Generated/WaitForWaitForUrlWithSpecificResponseContentAndStatusTest.php
@@ -13,10 +13,6 @@ public function test(): void
 
         $this->assertSame(0, $process->getExitCode());
         $this->assertStringEqualsFile(__FILE__ . '.output.txt', $process->getOutput());
-        if (file_exists(__FILE__ . '.err.txt')) {
-            $this->assertStringEqualsFile(__FILE__ . '.err.txt', $process->getErrorOutput());
-        } else {
-            $this->assertSame('', $process->getErrorOutput());
-        }
+        $this->assertSame('', $process->getErrorOutput());
     }
 }
diff --git a/tests/Examples/Generated/WaitForWaitForUrlWithStatusCodeOnlyTest.php b/tests/Examples/Generated/WaitForWaitForUrlWithStatusCodeOnlyTest.php
index 32c9adb8..9b60fb21 100644
--- a/tests/Examples/Generated/WaitForWaitForUrlWithStatusCodeOnlyTest.php
+++ b/tests/Examples/Generated/WaitForWaitForUrlWithStatusCodeOnlyTest.php
@@ -13,10 +13,6 @@ public function test(): void
 
         $this->assertSame(0, $process->getExitCode());
         $this->assertStringEqualsFile(__FILE__ . '.output.txt', $process->getOutput());
-        if (file_exists(__FILE__ . '.err.txt')) {
-            $this->assertStringEqualsFile(__FILE__ . '.err.txt', $process->getErrorOutput());
-        } else {
-            $this->assertSame('', $process->getErrorOutput());
-        }
+        $this->assertSame('', $process->getErrorOutput());
     }
 }
diff --git a/tests/Examples/Generated/YamlDumpTest.php b/tests/Examples/Generated/YamlDumpTest.php
index ac346164..1f30ba72 100644
--- a/tests/Examples/Generated/YamlDumpTest.php
+++ b/tests/Examples/Generated/YamlDumpTest.php
@@ -13,10 +13,6 @@ public function test(): void
 
         $this->assertSame(0, $process->getExitCode());
         $this->assertStringEqualsFile(__FILE__ . '.output.txt', $process->getOutput());
-        if (file_exists(__FILE__ . '.err.txt')) {
-            $this->assertStringEqualsFile(__FILE__ . '.err.txt', $process->getErrorOutput());
-        } else {
-            $this->assertSame('', $process->getErrorOutput());
-        }
+        $this->assertSame('', $process->getErrorOutput());
     }
 }
diff --git a/tests/Examples/Generated/YamlParseTest.php b/tests/Examples/Generated/YamlParseTest.php
index 29ffadf9..9bbf7d7b 100644
--- a/tests/Examples/Generated/YamlParseTest.php
+++ b/tests/Examples/Generated/YamlParseTest.php
@@ -13,10 +13,6 @@ public function test(): void
 
         $this->assertSame(0, $process->getExitCode());
         $this->assertStringEqualsFile(__FILE__ . '.output.txt', $process->getOutput());
-        if (file_exists(__FILE__ . '.err.txt')) {
-            $this->assertStringEqualsFile(__FILE__ . '.err.txt', $process->getErrorOutput());
-        } else {
-            $this->assertSame('', $process->getErrorOutput());
-        }
+        $this->assertSame('', $process->getErrorOutput());
     }
 }
diff --git a/tests/Examples/ListOnStaticBinTest.php b/tests/Examples/ListOnStaticBinTest.php
index 777ec64d..4a2d433e 100644
--- a/tests/Examples/ListOnStaticBinTest.php
+++ b/tests/Examples/ListOnStaticBinTest.php
@@ -11,7 +11,7 @@ class ListOnStaticBinTest extends TaskTestCase
     public function test(): void
     {
         if (!self::$binary) {
-            $this->markTestSkipped('This test for the binary version of Castor.');
+            $this->markTestSkipped('This test is for the binary version of Castor.');
         }
 
         $process = $this->runTask(['list', '--raw', '--format', 'txt', '--short']);
diff --git a/tests/TaskTestCase.php b/tests/TaskTestCase.php
index 8d96f684..290f9763 100644
--- a/tests/TaskTestCase.php
+++ b/tests/TaskTestCase.php
@@ -9,8 +9,8 @@
 
 abstract class TaskTestCase extends TestCase
 {
-    static string $castorBin;
-    static bool $binary = false;
+    public static string $castorBin;
+    public static bool $binary = false;
 
     public static function setUpBeforeClass(): void
     {